S0086 Mp4 Here

This indicates it is the 86th video recorded in that specific session or folder.

The primary "feature" of a name like S0086.mp4 is . The "S": Usually stands for "Stream" or "Sequence." S0086 mp4

This feature prevents your device from overwriting old footage and makes it easy to chronologically sort your videos in a file explorer. 2. High-Efficiency Compression This indicates it is the 86th video recorded

Because it is an file, the core feature is H.264 or H.265 (HEVC) Video Compression . it typically starts over at S0001

Once the device reaches a high number (like S9999 ), it typically starts over at S0001 , deleting the oldest files to make room for new ones.